Fuel system HPFP and Nozzle questions

GotStroke · Jul 24, 2014

Not looking to break the bank but I'm working on a new motor build and the last thing I want is to trash it because the pump lets go or an injector goes.

Current pump has 78K on it, and the only issue I've had was my sump on my Fass clogging and lost prime and the truck died out...... So kinda concerned on its reliability.

But I've haven't heard good things on the "new" rebuilt pumps. So I'm debating just keeping the pump or running the risk of a new pump.

Also going with dual pumps and not looking for much power more of reliability and a little power. Only planning 750 and it doesn't matter if it makes 1000 if it won't run.....

Stock nozzles should meet enough flow for my needs but reliability is my focus and curious if the design in the 15% or 30% wouldn't be better for longevity in the long run and power if I wanted.

I've looked and can't find anything on the nozzles but I might have not looked hard enough but still interested on y'all's opinion of my HPFP

Tree Trimmer · Jul 24, 2014

you can get morgan's duel fueler kit, and put the new pump there, and simply eliminate the one in the valley.

then if it leaks, so what. no hassle of duel fuelers.

GotStroke · Jul 24, 2014

True but would prefer to keep both if I can. Wondering is running dry once is too much to worry about or just keep it on vs the risk of a chitty "new" rebuilt one.

B585Ford · Jul 24, 2014

This is an excellent question. I can speak from first hand experience. When I was hot shotting I got bad fuel at 46k. Did my best to limit the damage but after that batch of fuel I had a slight surge....put another 16k miles all hooked to a trailer (7400 to 24k lbs) so the truck didn't live an easy life. Anyways, the surge slowly got worse over the next 16k miles until it almost became undriveable hooked to a trailer. So decided to replace the HPFP and upgrade the LP system. I got 3 bad remans in a row. While trying to figure out the problem, everything in the system was checked and rechecked including having Swamps flow test the injectors. Turns out the only thing that was bad was the HPFP remans. IMO keep your factory HPFP, I doubt 1 time of starving hurt it too much (if any). I don't trust the remans....I hate having one in my truck and always wondering if it is gonna let go. I have same thoughts as you....running Morgan's duals for reliability (by keeping the duty cycle down) more than anything although a few extra HP would be nice.
In terms of nozzles....I did go ahead and do 15% nozzles while I was in there. That was one of my most favorite upgrades!!!! The improvement in spool up is incredible. For how I use my truck, spool up is everything (not to mention I have a gear jammer). I may be sacrificing a little top end (I can only maintain 21500 RP on 2.3 PW tune) but I don't mind cause my truck isn't a competition truck...it is a DD and needs to be able to tow. With GH tunes my truck is essentially smoke free. I am gonna cut the PW back to 2.1 or so and hope to dyno them both in about month just to see what it will do differently.

GotStroke · Jul 24, 2014

B585Ford said:
This is an excellent question. I can speak from first hand experience. When I was hot shotting I got bad fuel at 46k. Did my best to limit the damage but after that batch of fuel I had a slight surge....put another 16k miles all hooked to a trailer (7400 to 24k lbs) so the truck didn't live an easy life. Anyways, the surge slowly got worse over the next 16k miles until it almost became undriveable hooked to a trailer. So decided to replace the HPFP and upgrade the LP system. I got 3 bad remans in a row. While trying to figure out the problem, everything in the system was checked and rechecked including having Swamps flow test the injectors. Turns out the only thing that was bad was the HPFP remans. IMO keep your factory HPFP, I doubt 1 time of starving hurt it too much (if any). I don't trust the remans....I hate having one in my truck and always wondering if it is gonna let go. I have same thoughts as you....running Morgan's duals for reliability (by keeping the duty cycle down) more than anything although a few extra HP would be nice.
In terms of nozzles....I did go ahead and do 15% nozzles while I was in there. That was one of my most favorite upgrades!!!! The improvement in spool up is incredible. For how I use my truck, spool up is everything (not to mention I have a gear jammer). I may be sacrificing a little top end (I can only maintain 21500 RP on 2.3 PW tune) but I don't mind cause my truck isn't a competition truck...it is a DD and needs to be able to tow. With GH tunes my truck is essentially smoke free. I am gonna cut the PW back to 2.1 or so and hope to dyno them both in about month just to see what it will do differently.

That's my exact fear, and same thoughts on the dual fuelers keeping the stress down on my current pump.

I was told of a thread concerning the design of the 15% vs stock nozzles but again couldn't find it.

The sole reason for the truck to to tow my home so I'm going to stay away from larger nozzles to keep it together.... Because otherwise my foot will wont cooperate

Only reason for going to 15% or 30% will be reliability over stock nozzles

RSK · Jul 24, 2014

GotStroke said:
That's my exact fear, and same thoughts on the dual fuelers keeping the stress down on my current pump.

I was told of a thread concerning the design of the 15% vs stock nozzles but again couldn't find it.

The sole reason for the truck to to tow my home so I'm going to stay away from larger nozzles to keep it together.... Because otherwise my foot will wont cooperate

Only reason for going to 15% or 30% will be reliability over stock nozzles

that is a bad ass truck and that camper looks heavy around 15k if I had to guess...

B585Ford · Jul 24, 2014

That is a h#ll of a setup. If your only concern is reliability, I can't see doing nozzles.

One last point....typically, modded HPFPs are not as reliable as non-modded HPFPs, but evidently MPD/MFI is getting NEW HPFPs that they are using to make their modded pumps.....who knows, maybe they will turn out to be more reliable than remans but the only I know about is in Mike's truck and it only has about 5k miles IIRC.

GotStroke · Jul 25, 2014

Nozzles weren't in the plan but after being told about aftermarket nozzles being better potentially it made me curious. But I haven't been able to find anything yet.

GotStroke · Jul 25, 2014

RSK said:
that is a bad ass truck and that camper looks heavy around 15k if I had to guess...

Pretty close... Unloaded

Probably end up a little on the heavy side when my DD is loaded. Guessing 20ish, axles are 7K, and this is why I can't really go too big or towing this thing will kill it.

Tree Trimmer · Jul 25, 2014

last i heard, jerry called the company making the ford reman pumps, and the company making the old good pumps, and was told that anyone outside of a actual ford entity could not buy a pump directly through them.

so i wonder if MFI is getting a "new" never been ran before pump, or a new reman pump.

so it could be a thing, that MFI is simply taking the pumps they get, and while working their magic to make them into their product, their going though the rest of the pump and tightening all the tolerances, especially on that front seal where all the leaks have come from, along with changing that seal to something alot better.

GotStroke · Jul 25, 2014

My mind is basically made up on the HPFP situation, but I'm still curious on the nozzle question. If anyone had any input on whether the machining of the nozzles help with reliability over stock please chime in. Or if you could point me in the right direction I would greatly appreciate it.

Tree Trimmer · Jul 25, 2014

no, there is no additional reliability in aftermarket nozzles, to stock ones.

if your going to keep stock, there is no need for dual pumps, which is why i was saying about the dual fueler kit, with only a single pump. gets you a new pump, but out front out of the motor, so if the front seal leaks, which has happened enough i would feel safe saying its possible, not a fluke occurrence, it does not fill the motor with fuel, it just runs out on the ground.

Craig@MFI · Jul 25, 2014

I wouldn't say thay bigger nozzles wouldn't make the truck more reliable when you can run a low pulsewidth that stock and get the same amount of fuel and be a lot less stressful on the pistons

Sent from my SAMSUNG-SM-N900A using Tapatalk

Tree Trimmer · Jul 26, 2014

i read it as, he was asking about the nozzle itself being more reliable.

GotStroke · Jul 26, 2014

Overall if they they make anythings life easier thats good for me.

B585Ford · Jul 27, 2014

GotStroke said:
Overall if they they make anythings life easier thats good for me.

As Craig was referring to...my EGTs do seem to be slightly cooler when cruising (steady speed) with the nozzles (of course I added a JHP at the same time which I am sure helps too). I shoot a vid if anyone wants proof, but unloaded on GH's race tune on flat ground running 55 MPH in OD in 80 degree heat and 95% humidity my EGTs stay below 500 with the AC on. I have noticed that when I am accelerating at a normal pace (on a race tune), the EGTs are a little higher.